are the inserts saturated...maybe he is just weeing more, so try adding an extra booster under whatever u usually use...or maybe he is weeing in bigger bursts - try a layer of cotton terry ontop of all inserts to absorb the first gush. maybe you have detergent build up?- wash with full dose of bio powder and rinse and rinse and rinse 100 times till no bubbles left in water...or maybe the pul needs re waterproofing, so try tumble drying them on hot for a bit.

I have been successfully using all napies upto 4 hours as my LO is not a big wetter, but nothng else has changed apart from the wet nappies.
I use a combination of all different inserts like microterry, blueberry combo(hemp and terry)

i'm sorry about my last post, was in a rush so just rambled off a list that probably makes no sense to you.
please feel free to ask me to explain any points, it seems i've done a lot of rambling notes today

it depends a lot of which detergent and how much and your machine.
i once made the mistake of using a small and mighty liquid and had build up almost immediately. you can tell if its build up as usually when it gets wee'd on you get a horrible smell.
i'd say if its only been 4 weeks then its mostly likely down to stuffing, but it never does any harm to do a few extra rinses and tumble dry the pockets just in case

I really don't understand.
Tried the new weenotions nappy(after washing) with double microterry(the bumgenius ones)insert today and the nappy still leaked. The W was directed downwards but the nappy wasn't soaked fully, however, the side straps and LO's vest and sleeping bag all got soaked.
What am I doing wrong.
Please help!!!!!!!!!!!!

Are you doing them up tight enough? If they are a bit loose wee may be able to escape through gaps.

or

I wonder whether he may be doing large fast wees and it can't absorb through the fleece fast enough. You may be able to find out by putting something absorbent in between him and the fleece (a folded up flannel or something like that), I haven't tried it myself, just an idea.

Can't think of anything else that hasn't already been suggested, but if I do I will be back